Grinding-machine.



U. STEINER.

GRINDING MACHINE.

APPLICA'HQN FILED APR.|7.1912.

Patented July 6, 1915.

3 SHEETS-SHEET i.

U. STEINER.

GRINDING MACHlNE.

APPLICATION FILED APR. I7- 19I2.

Patented July 6, 1915.

3 SHEETS-SHEET 2.

I i i1mmIIIIHIIIMIIIIIIII. I

U. STEINER.

GRINDING MACHINE.

APPLICATION FILED APII. I I. 1912.

Ptenwa July 6, 1915.

3 SHEETS-SHEET 3.

STATES PATENT OFFICE.

ULRICII STEINER, 0F WAYNESBORO, PENNSYLVANIA, ASSIGNOR TO LANDIS TOOLCOMPANY, 0F WAYNE'SBORO, PENNSYLVANIA, A CORPORATION OJ? PENNSYL- VANIA.

GRINDING-MACHINE.

To all whom t may concern:

Be it' knowny that I, ULRICH STEINER, a citizen of the United States,residing at Waynesboro, in the county of Franklin and State ofPennsylvania, have invented certain new and useful Improvements inGrinding-Machines, of which the following is a specification. i

My said 'nvention consists in various improvements in the details ofconstruction and arrangement of parts of grinding machines particularlyfor gninding cylindrical work of straight or tapered form, whereby sucha machine is adapted for grinding two or more pieces of worksimultaneously and with a single grinding wheel, thereby increasing thecapacity of the machine and saving a large percentage of labor in theproduction of a given quantity ofwork.

Another object of my invention is the provision of means for adjustingthe centers of the head-stock spindles with respect to the footstockspindles so as to bring and retain them in perfect alinement, thusassuring an even grinding action on the plurality of work-pieces and`also assuring an even grinding action throughout the length of eachwork-piece. e

With these and other objects in view my invention consists in aplurality of pairs of work-supporting spindles and a grinding element sorelated to said spindles that it will simultaneously act upon aplurality' of work-pieces supported by said spindles.`

It further consists in thenovel features and construction andarrangement of parts to be described hereinafter and pointed out in thesubjoined claims.

Referring to the accompanying drawings, which are made a part hereof andon which similar letters of reference indicate similar parts, Figure 1is a top or plan view of a grinding machine illustrating the means of,

swiveling the work table to bring the work to any angle desired inrelation to the grinding wheel for grinding tapered work, Fig. 2 a sideelevation of a cylindrical grinding machine equipped with my invention,said machine being only representative of one type to which my inventioncan be adapted, Fi'g. 3 an end View with thc driving pulley removed,Fig. 4 an enlarged transverse section taken on line 1o-fw. l `ig.

taken on line m-, Fig. 3, Fig. 6 an en- Specication of Letters Patent.

Patented July 6, 1915.

Application inea April 17, 1912. serial No. came.

larged substantially horizontal section taken on line 1/-@, Fig. 2, Fig.74 an enlarged substantially horizontal section taken portion of one ofthe stocks, Fig. 9 a front elevation of one ofthe spindle-cases, andFig. 10 a cross-section taken on line o-v, Fig. 5, looking into thedirection of the arrow crossing saidline. e

Referring now to the drawings in detail, the (reference numeral l,designates the frame or body of the machine which may be of any approvedconstruction, 2 is the head-stock and 3 the foot-stock, both mounted onthe work table A which is swiveleo. on said frame or bo( y by means ofthe pivot-b0lt t and secured yby clamping bolts al engaging segmentalgrooves a2 therein. Said head-stock and said foot-stock are securedon'said work-table by bolts 4, which have heads 5 engaging inlongitudinal T- shaped slots 6 in said work table, said bolts passingupthrough said head and footstocks and having nuts 7 applied to theirprojecting ends whereby said stocks are Secured in position. As iscommon in machines of this type, the head and foot-stocks may beAadjusted toward and from each other upon loosening said nuts and afterbeing positioned where desired, it is only necessary to tighten the nuts7 in order to`A and 10 and the spindles 9 and 11 are paired,

and each spindle has the inner end of its' bore slightly flared toreceive a tapered centering pin 12, as is common. Between the centeringpins of each pair of spindles, a work-piece 13 is supported.

The head and tail-stocks each comprise a main portion 14 and aspindle-case 15 adjustable vertically and horizontally on said mainportion. Eachj.spindlecase has two` longitudinal bores 16, 17, the endsof the bores in the head-stock being counterbored to provide beveledseats 18 for a purpose to presently appear.

Each of the spindlesof the head-stock` comprises a sleeve 19 fittingloosely within 1 t BEST AVAILABLE COP' the spindle-case but having atits inner end an enlargement 20 and between said enlarged end and theintermediate portion having a collar 21 with a beveled or conical face22 litting the adjacent counterbore or beveled seat 18 of thespindle-case. Near the opposite end of said sleeve it is reduced indiameter, as at 23, and between said reduced portion and theintermediate portion is an annular groove 24 which providesclearance'for a. cone 25 tting onto said reduced portion. This groove isprovided owing to the fact that a reduction in diameter as commonlyTmade creates an abrupt shoulder which would prevent the properadjustment of the cone on the spindle. Said cone is seated against theadjacent counterbore or beveled seat 1S of the spindle-case, lso thatthe spindle is supported only at the ends of the spindle-case 1n orderthat the spindle.; of the headstock may be securely held in said stock,the outer end ot' each spindle is further reduced in diameter andexternally threaded and on such ends a jam-nut 2h is threaded whichbears against the outer face of the cone, forcing the latter against itsseat and drawing the spindle outward to properly seat the conical faceol the collar 21 against its seat. 1t is apparent from the foregoing,that the annular groove '34 provides the necessary clearance space toenable the cone 25 to be tightened against its seat while drawing thespindle outward. ll'ithin the inner ends of the spindles are fitted thecentering pins 12 which form part. ot' the spindles and are so to beconsidered when reference is made broadly to the spindles. Eachcentering pin has the usual conical outer end which is to be forced intothe work-piece. Obviously the centering pin or terminal as it may alsobe called, may be in piece with the main portion of the spindle; or, achuck or other appliance maybe attached to the spindle which may hold orin which may be fitted suitable parts to hold the work-piece; or, in

lieu ot the centering-pin any other form of centering element orterminal may be used.

The spindles of the foot-stock may be constructed in any connnon manner,and by means ot' hand wheels 2T they may hedrawn into the spindlesproper or spindle-case, as the case may be. to release the work-pieces.

The spindles 5l, of the head-stock have face-plates rotatably mounted ontheir enlarged inner ends. each tace plate having an integral gear 2S)which is in mesh with a pinion 30 secured to the inner end of a shaftIll suitably journalcd in the spindle-case and having a pulley 2.'secured to its outer end around which passes a belt lil for driving'said shaft. hut any other approved method oi rotating' said .shaft mayhe resorted to. ie shaft ill is arranged parallel with` the :pindlcs andthrough the intervention of saidA pinion and the gears 29 causes saidface-plates to rotate in unison in the same direction.

Projecting from each face-plate is a pin 3-t which engage dogs 35secured to the adjacent ends of the work-pieces, said pins enteringforked portions 36 in the do s and transmitting the rotary motion of saifaceplates to the work-pieces.

The spindle-case ofthe head-stock as well as that of the foot-stock isadjustable on the main or body portion of the stock for the purpose ofadjusting the spindles vertically, the purpose and advantages of whichwill appear hereinafter. This is accomplished by cutting into the mainportion of each stock a guide and retainer groove 37 which is arrangedat an angle to the base of the main or body portion of the stock, or atan angle to the spindles, and fitting into such groove is a tongue orextension 38 of the spindle-case having guide edges 39 fitting theguiding walls of said groove, said tongue or extension having its guideedges at a corresponding angle. Adjusting screws 40 are provided whichpass through parts of the main or body-portion of the stock and takeinto parts of the spindle-case so that upon manipulation of said screws,the spindlecase can be moved lengthwise on the cooperating main orbody-portion with a complementary upward or downward movement, dependingon the lengthwise direction the spindle-case is moved. The adjustingscrews are not depended upon to retain the spindle-cases in properposition, as considerable pressure is exerted on the cases during thegrinding action and the adjusting screws must work comparatively easy.For such purpose I provide securing screws il which pass through themain or bodyportions of the stocks and take into the spindle-cases. Inthis manner absolute security is assured after having-adjusted the`spindle-cases to desired positions.

. The head and foot-stocks are positioned on the work table A at thelfront of the frame or body l of the machine,- and at the rear a carriagel2 is longitudinally movable and rests upon a plane 'faced track 43 anda V-shaped groove i4, it having eooperating guide-portions if, 4o,respectively, and also a gear track 47 with which meshes a pinion 4Ssecured to a transverse shaft 49 journaled in thc traine or body l andharing at its front end a hand wheel 5U lor inanually rotatingr saidshaft and primarily for positioning the carriage for the commencementot' operations. On said shaft 49 is secured a bevel gear 5l which mesheswith a bevel gear 52 secured to a longitudinallydisposed shaft 53journaled in the frame or body l. and where it projects from the end tthe frame o r body it has a roue-pulley 54 secured thereto around nhichpasses u llO BEST AVAILABLE belt-55 for rotating saidlongitudinally-disposed shaft which, through the intervention of thebeve -gears 51 52, and shaft 49 cause invention appertains it will beclear, when I -state the carriage 42 carries the grinding 4element to bepresently described, that sai ferent diameters, the two pairs of thespincarriage reciprocates on the frame or body and that by means of acountershaft, commonly employed with machines of this type, the operatormay reverse the moyernent. of the carriage at will or stop the same ifdesired,'or automatic reversal may be provided for.

56 designates a carrier or base which is guidedvfor transverse movementon the carriage 42, said, movement being1 at right-an-`- gles to that of,the carriage andtherefore",y

toward and from the work-pieces` carrier is adjusted'i'n any well'knownmanner and has a pintle 57 journaled therein, on which is secured anemery-wheel or other grinding device. Said .spindle has also a pulley 58secured thereto, around which is passed a belt 59 for driving saidemerywheel. The emery-wheel is movedin coritact with the work-piece whenthe carrier 56 is properly adjusted.

The vertical adjustment offthe spindles on the head and foot-stocksfacilitates alining or locating the work-supporting cen'ters properlyrelativeto the emery-wheel spindle, and this feature is of decidedadvantage when it is desired to grind one work-piece to a largerfinished size than the other; for eXample,-assuming that the work-piecesto bel ground are of equal size when placed in the grinding machine andtheir centers areA exactly the same distances above and beneath a planepassing horizontally through This the axis of the grinding-wheel, thetwo` work-pieces will be ground to exactly equal size; now assuming, thespindle to beadjusted vertically so as to bring the. center of the upperwork-piece one-sixteenth of an inch farther from a plane passinhorizontally through the axis of the grin ing-wheel than the lower, thelower work-piece will be acted upon after the upper work-.piece isground to its proper size, therefore, grinding the work pieces todifferent finished sizes, the lower being ground to smaller size. Or, ifthe centers of the lower work-piece is farther from lsaid plane than theupper,

said upper work-piece will be ground to smaller size. .It is apparenttherefore, that bythe use of my invention, a plurality of Work piecescan be ground simultaneously to' the same or different sizes. Ingrinding tapered Work it is only necessary to adjust the work table A onits pivot a as before indicated 'to secure the anglel desired. In

grinding shafts having opposite ends of difinches in length, each to beground to a diameter of one inch vfrom one end to its center and to adiameter of one and one-half inch from its other end to its center,would be supported at the ends by two pairs of spindles, the shaftsbeing reversed, end for end. Now, assuming the upper shaft to'be actedupon to a finish of one and one-half inch and the lower to a nish of oneinch, the spindle casings would have to be adjusted to bring the upperpair of spindles a distance above the horizontal center of the grindingwheel to finish the upper workpiece to a diameter of oneand one-halfinch while the lower'is adjusted with the upper and is brought theproper distance closer to said horizontal center to assure its" finishto a diameter of one-inch. When this is com pleted and the shafts areground to a'nish, they`A are removed frornthe work-supporting the otherand at the same 'time reversed end vfor end, thus the undergroundportions of the shafts can be ground tofproper size without resortingtothe line adjustment reuired by the spindles. It is of course unerstoodthat when grinding shafts under such conditions, the grinding-wheel ismoved lengthwise on the body or frame only the distance the shafts areto be ground at one operation, After being once adjusted, the spindlesneed Vnot again be moved until another job is to be ground underdifferent conditions or requirements. The construetion of the spindlesas above described is also of prime importance, as it is almostimpossible to accurately "bore the spindle bores in the head andtail-stocks so that when, said stocks are placed on the frames or bbdylthey .will be in perfect alineinent. Therefore, `when 'the spindles areplaced in -their respective bores and it is found that the distancebetween centers of the spindles of one stock do not correspond with thedistance between centers of those of the other, or when the spindles ofone stock are not in the same verti cal plane as those of the other, itis simply necessary to scrape or grind the counterbore .or counterboresof the headstock at the proper place or places to make the center ofboth stocks correspond inevery way. I

It is apparent from the foregoing that an operator at a machineconstructed according to my invention can produce nearly as much Work,as two operators at two machines of the ordinary type.

As the illustrations and the description of my invention above givenarekmerely of a .centers-ef:tbelspindles and replaced one forBEST/miniers representative form of a grinding machine embodying myinvention, it is clear that minor changes in the details of constructionor arrangement of parts may be resorted to without departing from thespiritof my invention or sacrilicing any of the advantages thereof, andI therefore hold myself at liberty to make such changes in constructionand arrangement as fairly fall Within the scope of the subjoined claimswhich are to be given the broadest interpretation permissible by theprior art.

Having thus described my invention, what I claim is,-

1. A grinding machine comprising a plurality of pairs of Work-supportingspindles and a singlel rotary circulargrinding element positionedrelatively tio said spindles to simultaneously act upon a plurality ofworlrpieces supported by the respective spindles, the axes of saidWork-supporting spindles and grinding element being in parallel planes.

2. A grinding machine comprising means for rotatably supporting aplurality ot' workpieces and a rotary circular grinding device adaptedto simultaneously act upon said wcrlc-pieceshtlie axes of saidWork-supporting spindles and grinding element being in parallel planes.

3. A grinding machine comprising means :tor rotatably supporting aplurality of Workpieces and a. grinding device arranged tosimultaneously act upon said Work-pieces,s aid supporting means andgrinding device being relatively movable to permit of grinding saidwork-pieces to the same or different diameters.

4. A grinding machine comprising a plurality of pairs of work-supportingspindles and a rotatable circular grinding device arranged to beoperatively positioned in different relationship to the several pairs ofwork-supporting spindles, whereby it is adapted to act against aplurality of workpieces supported by said spindles to grind saidwork-pieces to' different diameters.

A grinding machine comprising a plurality of pairs of work-supportingspindles and a grinding-wheel cooperating with said pairs of spindles tosimultaneously act against, a plurality of work-pieces supported by saidspindles, the axes of said spindles and said grinding-wheel beingmovable relatively to bring the axis of the grindingwheel closer to oneof said Work-pieces than the other or others.

6. A grinding machine comprising a plurality of pairs of work-supportingspindles and a rotatable grinding device coperating with said pairs ofspindles to simultaneously act upon a plurality ot' work-piecessupported by said spindles, said spindles being adjustable vertically tocause one pair to he a greater distance from a horizontal plane aplurality of work-pieces supported by'.

-said spindles, said spindles being adj ustabl(` vertically and saidgrinding-wheel being adjustable horizontally toward and from saidspindles.

9. A grinding machine comprisinv' a frame or body, a work-table swiveleon said frame or body, head and foot-stocks 0n said Work table, saidstocks having spindle casings adjustable thereon, and work-supportingspindles within said spindle casings.

10. A grinding machine comprising a frame or body, a work table, hcadand footstoclrson said work table, each stock having t\vo.parts, one ofwhich is adjustable on the other, and work supporting spindles in saidadjustable part.

11. A rinding machine comprising a frame or body, head and foot-stockson said frame or body including adjustable parts, and a plurality'otlwork-supporting spindles in the adjustable part of cach stock.

12. A grinding machine comprising a frame or body, head and foot-stockson said frame or body, and a plurality of pairs of work-supportingspindles in each stock, at least one of said stocks having an adjustablepart in Which its work-supporting spindies are located.

13. A grinding machine com rising a frame or body, head and foot-stoc son said frame or body, at least one of said stocksI being adjustablelengthwise on said fame or body, and work-supporting spindles in saidstocks, at least one, of said stocks having a vertically adjustable partin which its worksupporting spindle or spindles are located.

14. A grinding machine comprising a frame or body, head and foot-stockson said. frame or body, each stock comprising a main or body portion anda spindle-casing adjustable lengthwise on said main or body portion witha complementary vertical adjustment, and work-supporting spindles insaid spindle-casings.

' 15. A grinding machine comprising a frame or body, head andfoot-stocks on said frame or body, each stock Comprising a main or bodyportion and a spindle-casing adj ustessi Amma;

able on said main or body portion in an inclined plane, andWork-supporting spindles in said spindle-casings.

16. A grinding machine comprising a frame or body, stocks on said frameor body having spindle bores therein, and spindles in said bores, saidspindle bores being made to readily change the axis Vof one spindle tobring the same in alinement with that of the other. 17. In a grindingmachine, a spindle stock having a spindle bore therein counterbored atopposite ends, and a spindle in saidbore having conical enlarged partsfitting the counterbored ends of said bore.

18. In a. grinding machine, a spindle stock having a spindle boretherein with countery bored ends, a spindle fitting in said bore andhaving a conical enlargement fitting one of counterbored ends of saidbore, and a cone secured to said spindle and fitting the othercounterbored end of said bore.

19. In a grinding machine, a spindle stock having a spindle bore thereinwith counterbored ends, a spindle fitting in said bore and having aconical enlargement near one end fitting one `of the counterbored endsof said bore and having also an annular groove near its other end, saidspindle being reduced in diameter ad]`a`cent said groove, a

cone on the reduced portion of said spindle means for adjusting andsecuring said table on its pivot, a head-stock and a foot-stock on saidWork-table, each of said stocks being provided with a plurality of Workholding provided With a plurality of Work holding devices, means foradjusting and securing said table, a grinding Wheel, and means foradjusting and driving4 said grinding Wheel to act upon the s eparatepieces of Work mounted in saidy several Work-holding devices,substantially asset forth.

22. A grinding machine comprising a frame, a Work table swiveled on saidframe, a plurality of sets of Work holding devices on said table adaptedto support several separate pieces of Work, means for adjusting andsecuring said table on its pivot, and a grinding wheel mounted vtooperate upon the several pieces of Work simultaneously, substantially asset forth.

In Witness whereof, I have hereunto set my hand and seal at Waynesboro,Franklin co., Pennsylvania, this thirteenth day ofv April,'A.'D.nineteen hundred and twelve.

ULRICH STEINER. [1.. s]

litnesses i WATsoN'R. DARsiN, JosErHiNE ROLLMAN.

